wsmm........both Ford and M/S say to set BOTH the down-pointing mainjet and the side-pointing idlemix to 1-turn. (you do understand what a turn is, don't you?) Me? I recommend adjusting the down-pointing mainjet to 2-turns and LEAVITT!!!
I then adjust the side-pointing idlemix for FASTEST idle ...NOT... smoothest idle. Understand the difference??? I then adjust the behind the carb idlespeed to under 500-rpms. (probably 1/2-turn) I then re-adjust the side-pointind idlemix for FASTEST idle. I do that at least 3-times.
Last time I adjusted my eazy starting 6-volt 52-8N, the side-pointing idlemix was about 1/8-turn and idle was 435-rpms on new proofmeter. Yours will be different. Remember, the side-pointing idlemix is BASSACKWARDS, out for lean and IN for ENRICH. ........HTH, Dell